stdnum
Version:
Standard Number Validation
71 lines • 5.68 kB
JavaScript
import * as exceptions from '../exceptions';
import { isValidDate, strings } from '../util';
import { weightedSum } from '../util/checksum';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const impl = {
name: 'Polish National Identification Number',
localName: 'Powszechny Elektroniczny System Ewidencji Ludności',
abbreviation: 'PESEL',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return value;
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 11) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [yy, mm, dd] = strings.splitAt(value, 2, 4, 6);
const month = parseInt(mm, 10);
let century;
if (month >= 80) {
century = '18';
}
else if (month >= 60) {
century = '22';
}
else if (month >= 40) {
century = '21';
}
else if (month >= 20) {
century = '20';
}
else {
century = '19';
}
if (!isValidDate(`${century}${yy}`, String(month % 20), dd, true)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [front, check] = strings.splitAt(value, -1);
const sum = weightedSum(front, {
weights: [1, 3, 7, 9, 1, 3, 7, 9, 1, 3],
modulus: 10,
});
if (String((10 - sum) % 10) !== check) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: true,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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